字符A-Z -> ABCD...XYZ

#include<stdio.h>

void expand(char s1[],char s2[])
{
    int i,j;
    char c;
    
    i=j=0;
    while((c=s1[i++])!='\0')
    {
        if(s1[i]=='-' && c<s1[i+1])
        {
            i++;
            while(c < s1[i])
            {
                s2[j++]=c++;
            }
        }
        else
            s2[j++]=c;
    }
    s2[j]='\0';
}

main()
{
    char s1[]="0-zd-l";
    char s2[100];
    
    expand(s1,s2);
    printf("s1=%s\ns2=%s\n",s1,s2);    
}